Just over a week after Walmart recalled 1.5 million of its Durabrand DVD players because their circuit boards can overheat and start fires, the world's largest retailer is recalling another 2.7 million of the low-cost machines -- 4.2 million in all, the U.S. Consumer Product Safety Commission said.

The Chinese-made DVD players were selling for $29 exclusively at Walmart stores nationwide. Consumers reported 14 incidents of the players overheating and seven fires blamed on the machines.

One reader told AOL that she came home to a strong burning smell and called the fire department. She said firefighters tracked the odor to her smoldering DVD player.